Section 26: Citizenship by registration.

1 Subject to the provisions of section 28 of this Constitution, a person to whom the provisions of this section apply may be registered as a citizen of Nigeria, if the President is satisfied that-
a he is a person of good character;
b he has shown a clear intention of his desire to be domiciled in Nigeria; and
c he has taken the Oath of Allegiance prescribed in the Seventh Schedule to this Constitution. [Seventh Schedule.]

2 The provisions of this section shall apply to-
a any woman who is or has been married to a citizen of Nigeria; or
b every person of full age and capacity born outside Nigeria any of whose grandparents is a citizen of Nigeria.